The date of publication or update of the content is made available in programmatic form
It is advisable to indicate a publication date in your books. This date should also be available in the code of your pages. It’s a way to help machines identify and classify content.
Objectives
Provide a publication date for reading and indexing tools
Improve ranking by reading and classification engines
Implementation
Use the dc:date metadata for the publication date
Use the dcterms:modified metadata to indicate the date of the last modification made to the file
Control
Check the presence and accuracy of the metadata dc:date
Check the presence and relevance of the metadata dcterms:modified